<script setup>
import { getCategoryFilterAPI,getSubCategoryAPI } from '../../apis/category';
import { ref,onMounted } from "vue";
import { useRoute } from 'vue-router';

import GoodsItem from "../Home/components/GoodsItem.vue"

const categoryData = ref({});
const route = useRoute();
const getCategoryData = async() => {
  const res = await getCategoryFilterAPI(route.params.id);
  categoryData.value = res.result;
}

onMounted(() => {
  getCategoryData();
})

// 获取基础列表数据渲染
const goodList = ref([])
const reqData = ref({
  categoryId: route.params.id,
  page: 1,
  pageSize: 20,
  sortField: 'publishTime'
})
const getGoodList = async() => {
  const res = await getSubCategoryAPI(reqData.value);
  console.log(res);
  goodList.value = res.result.items;
}

onMounted(() => {
  getGoodList()
})

// tab切换
const tabChange = ()=>{
  // 重置一下页码,不然在前面请求了其他页,然后突然切换tab, 此时需要重置，重新请求第一页数据
  reqData.value.page = 1;

  // 重新请求数据
  getGoodList();
}


// 加载更多
const disabled = ref(false);
const load = async() => {
  console.log("加载更多数据喽");
  // 获取下一页的数据
  reqData.value.page++;
  const res = await getSubCategoryAPI(reqData.value);
  goodList.value = [...goodList.value, ...res.result.items];

  // 加载完毕, 停止监听
  if(res.result.items.length === 0){
    disabled.value = true;
  }
}

</script>

<template>
  <div class="container ">
    <!-- 面包屑 -->
    <div class="bread-container">
      <el-breadcrumb separator=">">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item :to="{ path: `/category/${categoryData.parentId}` }">{{ categoryData.parentName }}
        </el-breadcrumb-item>
        <el-breadcrumb-item>{{ categoryData.name }}</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="sub-container">
      <el-tabs v-model="reqData.sortField" @tab-change="tabChange">
        <el-tab-pane label="最新商品" name="publishTime"></el-tab-pane>
        <el-tab-pane label="最高人气" name="orderNum"></el-tab-pane>
        <el-tab-pane label="评论最多" name="evaluateNum"></el-tab-pane>
      </el-tabs>

      <!-- v-infinite-scroll绑定一个回调函数, 下拉触底时触发 ; infinite-scroll-disabled控制v-infinite-scroll的激活状态 -->
      <div class="body" v-infinite-scroll="load" :infinite-scroll-disabled="disabled">
         <!-- 商品列表-->
         <GoodsItem v-for="goods in goodList" :goods="goods" key="goods.id"></GoodsItem>
      </div>
    </div>
  </div>

</template>



<style lang="scss" scoped>
.bread-container {
  padding: 25px 0;
  color: #666;
}

.sub-container {
  padding: 20px 10px;
  background-color: #fff;

  .body {
    display: flex;
    flex-wrap: wrap;
    padding: 0 10px;
  }

  .goods-item {
    display: block;
    width: 220px;
    margin-right: 20px;
    padding: 20px 30px;
    text-align: center;

    img {
      width: 160px;
      height: 160px;
    }

    p {
      padding-top: 10px;
    }

    .name {
      font-size: 16px;
    }

    .desc {
      color: #999;
      height: 29px;
    }

    .price {
      color: $priceColor;
      font-size: 20px;
    }
  }

  .pagination-container {
    margin-top: 20px;
    display: flex;
    justify-content: center;
  }


}
</style>